UART - Communication with two devices

Miguel Castro Vieira

Other Parts Discussed in Thread: CC2650

Hi,

I have been trying to implement communication with 2 different devices through UART. For that I tried to use the same UART to communicate with both but without great success, because one work fine, the other doesn't like it. So I was reading how to implement two UART, as I know that cc2650 only have 1, I know that I need to close one to start the other. The problem is that I need to change the board files to include another UART for different PINs. I did that and I notice that this variable "CC2650DK_5XD_UARTCOUNT" stay always 1 and not two as I need.

CC2650DK_5XD.h

/* UART Board */
#define Board_UART_RX                       IOID_4          /* P1.7  */
#define Board_UART_TX                       IOID_3          /* P1.9  */

#define Board_UART_RX1                      IOID_12          /* P1.7  */
#define Board_UART_TX1                      IOID_11          /* P1.9  */

#define Board_UART                  CC2650DK_5XD_UART0
#define Board_UART1                 CC2650DK_5XD_UART1

typedef enum CC2650DK_5XD_UARTName { CC2650DK_5XD_UART0 = 0, CC2650DK_5XD_UART1 = 0, CC2650DK_5XD_UARTCOUNT } CC2650DK_5XD_UARTName;

now CC2650DK_5XD.c

/* UART objects */
UARTCC26XX_Object uartCC26XXObjects[CC2650DK_5XD_UARTCOUNT];
unsigned char uartCC26XXRingBuffer[CC2650DK_5XD_UARTCOUNT][32];

/* UART hardware parameter structure, also used to assign UART pins */
const UARTCC26XX_HWAttrsV2 uartCC26XXHWAttrs[CC2650DK_5XD_UARTCOUNT] = {
    {
        .baseAddr       = UART0_BASE,
        .powerMngrId    = PowerCC26XX_PERIPH_UART0,
        .intNum         = INT_UART0_COMB,
        .intPriority    = ~0,
        .swiPriority    = 0,
        .txPin          = Board_UART_TX,
        .rxPin          = Board_UART_RX,
        .ctsPin         = PIN_UNASSIGNED,
        .rtsPin         = PIN_UNASSIGNED,
        .ringBufPtr     = uartCC26XXRingBuffer[0],
        .ringBufSize    = sizeof(uartCC26XXRingBuffer[0])
    },
    {
        .baseAddr       = UART0_BASE,
        .powerMngrId    = PowerCC26XX_PERIPH_UART0,
        .intNum         = INT_UART0_COMB,
        .intPriority    = ~0,
        .swiPriority    = 0,
        .txPin          = Board_UART_TX1,
        .rxPin          = Board_UART_RX1,
        .ctsPin         = PIN_UNASSIGNED,
        .rtsPin         = PIN_UNASSIGNED,
        .ringBufPtr     = uartCC26XXRingBuffer[0],
        .ringBufSize    = sizeof(uartCC26XXRingBuffer[0])
    }
};

/* UART configuration structure */
const UART_Config UART_config[] = {
    {
        .fxnTablePtr = &UARTCC26XX_fxnTable,
        .object      = &uartCC26XXObjects[0],
        .hwAttrs     = &uartCC26XXHWAttrs[0]
    },
    {
        .fxnTablePtr = &UARTCC26XX_fxnTable,
        .object      = &uartCC26XXObjects[0],
        .hwAttrs     = &uartCC26XXHWAttrs[0]
    },
    {NULL, NULL, NULL}
};

Do you know what I'm missing? When this is working with simple RTOS I will add it in a BLE program. Thank you.

Best Regards,

Miguel Vieira

over 9 years ago

0 YiKai Chen over 9 years ago

Guru 735695 points

There's UART emulator in Sensor Controller which I suggest you to use as second UART connection instead of changing pins between two UART pin defines.

0 Miguel Castro Vieira over 9 years ago in reply to YiKai Chen

Intellectual 835 points

Thank you for your reply,
But I already tried to use the sensor controller but without success, I followed the example in sensor controller and used a device to see the characters in realTerm and nothing (probably I was doing something wrong). But apart from that, do you know what I need to change in my board files or a better example to test UART using the sensor controller?

Best regards,
Miguel Vieira

0 YiKai Chen over 9 years ago in reply to Miguel Castro Vieira

Guru 735695 points

There is only one UART Emulator example in Sensor Controll and no others.

0 Miguel Castro Vieira over 9 years ago in reply to YiKai Chen

Intellectual 835 points

Hi Yikai,

I tried the example from sensor controller but it doesn't work properly.

    // Start the UART emulator task
    scifExecuteTasksOnceNbl(BV(SCIF_UART_EMULATOR_TASK_ID));

    // Enable baud rate generation
    scifUartSetBaudRate(9600);

    // Enable RX
    scifUartSetRxEnableReqIdleCount(1);
    scifUartRxEnable(1);

    // Main loop
    while (1) {

        // Loop back any received characters
        while (scifUartGetRxFifoCount()) {
            scifUartTxPutChar((char) scifUartRxGetChar());
            PIN_setOutputValue(ledPinHandle, Board_LED0, !PIN_getOutputValue(Board_LED0));
        }
    }

I add this code to my main task on UART echo example. Run it and nothing, can you tell me what i'm doing wrong? Thank you.

Best Regards,

Miguel Vieira

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UART - Communication with two devices